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Recycling method of barium-based compound in process of preparing acetylene from BaC2

A technology of compound and acetylene, which is applied in the recycling field of barium-based compounds in the process of making acetylene from BaC2, can solve the problems of high price and toxicity of barium carbonate, and achieve the effect of improving economic and social benefits and reducing barium pollution

Pending Publication Date: 2022-05-27
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, because barium is a heavy metal element, many barium-containing compounds are toxic; on the other hand, barium carbonate is expensive and must be recycled to control the process cost

Method used

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  • Recycling method of barium-based compound in process of preparing acetylene from BaC2
  • Recycling method of barium-based compound in process of preparing acetylene from BaC2

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A BaC 2 The recycling method of barium-based compound in the acetylene process, the process flow of the method is as follows figure 1 As shown, the process specifically includes the following steps:

[0026] Add water to the barium-rich slurry produced by wet gas production of acetylene to prepare a hot slurry with a temperature of about 80 ° C and a water content mass fraction of 70%, and filter while hot to obtain a filter cake and a combination of the filtration mother liquor and the eluent. of hot solution. After drying, the filter cake is bagged and used as a barium-based raw material for radiation-proof cement; the hot solution is kept warm to keep the temperature at 70°C. Pump hot solution into CO 2 In the carbonization kettle, BaCO is obtained 3 suspension; the BaCO 3 The suspension is pumped into a settling tank to obtain BaCO with a water content of about 18% 3 Thick slurry and supernatant. the BaCO 3 The thick slurry is sent to the granulation process...

Embodiment 2

[0032] A BaC 2 The recycling method of barium-based compound in the acetylene production process specifically comprises the following steps:

[0033] Hot water is added to the barium slag with a water content mass fraction of about 30% by-product of dry gas production of acetylene to prepare a hot slurry with a water content of 70% and a temperature of about 80°C. The hot slurry is filtered while it is hot to obtain a filter cake and a hot solution from the filtration mother liquor and the eluent; 2 The by-product is about 90 kg of barium-based raw materials for dry-based radiation-proof cement. Insulate the hot solution at around 80°C and pump in CO 2 In the carbonization tower, BaCO is obtained 3 Turbid liquid; BaCO 3 The turbid liquid is pumped into the settling tank to obtain BaCO with a water content of about 18% 3 thick paste. the BaCO 3 The slurry is sent to the granulation process, mixed with blue carbon powder, and wet granulated to prepare BaC according to the...

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Abstract

The invention discloses a cyclic utilization method of a barium-based compound in a process for preparing acetylene from BaC2. The method comprises the following steps: step 1, adding hot water into the barium-rich residue formed in acetylene preparation by dry-method gas generation, and fully stirring to prepare hot slurry with the Ba (OH) 2 content of 20-65wt% as a filtering stock solution; barium-rich hot slurry formed by acetylene preparation through wet gas generation is directly used as a filtering stock solution; and 2, carrying out hot filtration on the filtered stock solution to obtain a Ba (OH) 2 solution, introducing CO2 into the Ba (OH) 2 solution obtained by hot filtration for carbonization to form BaCO3 slurry, and recycling the BaCO3 slurry as a raw material for synthesizing BaC2. According to the method, barium slag or barium slurry generated after acetylene preparation through BaC2 gas generation is separated and purified, barium resources are recycled to the maximum extent, meanwhile, CO2 can be absorbed in the process, and the coal-to-calcium carbide acetylene process is changed into a green process with negative carbon emission and zero solid waste emission.

Description

technical field [0001] The invention belongs to the technical field of acetylene production, in particular to a kind of BaC 2 A method for recycling barium-based compounds in an acetylene production process. Background technique [0002] The status quo of the energy structure of "rich coal and lean oil" in China determines the important position of coal chemical industry in my country's industrial production, while coal-to-calcium carbide (CaC 2 ) technology is an important part of my country's coal chemical industry, mainly used to produce acetylene, the raw material of important chemicals such as polyvinyl chloride (PVC) and 1,4-butanediol (BDO). The calcium carbide market demand is strong, and the national calcium carbide output in 2020 will reach 28.88 million tons. The traditional production technology of calcium carbide has the shortcomings of "high temperature, high energy consumption, high pollution and high carbon emission", which does not meet the development req...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01B32/935C10H19/00
CPCC01F11/188C01B32/935C10H19/00Y02P40/10
Inventor 赵虹姜标李淼陈思远
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI